3775年历史的木质埋葬支持"木质顶"作为一种持久的碳去除方法
Ning Zeng1, Xinpeng Zhao2, Ghislain Poisson3
1Department of Atmospheric and Oceanic Science and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, USA.
概括
古代木材保存了近4000年, 显示出一种新的碳去除策略. 在无氧粘土土壤中埋葬木质生物质每年可以封存几千的二氧化碳.
科学领域:
- 环境科学
- 地质学
- 生物地质化学
背景情况:
- 地球上的光合作用每年都会去除大量大气中的二氧化碳,但分解大多会将其返回大气中.
- 长期碳封存对于缓解气候变化至关重要.
研究的目的:
- 在无毒土壤环境中研究古代木质生物质的保存潜力.
- 探索使用埋藏木质生物质作为碳去除策略的可行性.
主要方法:
- 在2米深的粘土土中保存的3775岁的古木头.
- 古代木材样本中的碳含量与现代样本进行比较,以评估腐烂和碳损失.
主要成果:
- 在3775年的时间里,
- 粘土土壤的低透性被认为是防止分解的可能因素.
- 使用此方法估计每年全球碳捕获潜力高达10千兆.
结论:
- 在无氧,低透性土壤中埋葬木质生物质为长期去除二氧化碳提供了一个有希望的混合自然工程方法.
- 这种方法显示了具有成本效益的碳封存潜力,在优化后估计每30-100美元.
相关概念视频
Introduction to Wood
210
Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the...
The structural integrity of the...
210
The Carbon Cycle
37.1K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
37.1K
Wood Products
79
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
79
Softwoods and Hardwoods
149
Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
149
Seasoning of Wood
87
Seasoning of wood is a crucial process aimed at reducing and stabilizing the moisture content within the wood to prevent future shrinkage, structural damage, or aesthetic issues once the wood is used in construction. Wood naturally swells when it absorbs moisture and contracts as it dries.
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
87
Carbon Skeletons
107.5K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
107.5K


